求助 GWD22-Q41 急

Q41P-SC46

If current trends continue, by the year 2010 carbon emissions in the United States
            will soar to a level more than one-third higher than were those in 1990, according to official projections.

A.    will soar to a level more than one-third higher than were those

B.    will soar to a level more than one-third higher than that

C.    would soar to a level more than one-third higher than is was

D.    would soar to a level more than one-third higher than those

E.     would soar to a level more than one-third higher than they were

答案是A，但是我选了E   觉得A的 were those 很奇怪啊

were those是部分倒装.

those指代carbon emissions.

第二个than 前后比较的对象应该是level，而不是carbon emissions。所以后面用those或they都错